Note : i am not sure of the component which i selected. 

Manage plugins page is getting crashed, even i tried uninstalled and install the jenkins and it will be good but after few couple of days i am seeing the issue again and can't be able to manage the plugins.

There were errors checking the update sites: JSONException: Expected a ',' or '}' at character 72 of {font-family:Titillium Web;font-style:normal;font-weight:200;src:local("Titillium WebThin"),local("TitilliumWeb-Thin"),url(/static/TitilliumWeb-Thin-9914b1ba7c4bcaa940fa2026609f4f61.ttf) format("truetype")}@font-face{font-family:Ubuntu;font-style:normal;font-weight:300;src:local("Ubuntu Light"),local("Ubuntu-Light"),url(/static/Ubuntu-Light-d83f9a6602ac71714516d7f0a930fcbc.ttf) format("truetype")}@font-face{font-family:Ubuntu;font-style:normal;font-weight:700;src:local("Ubuntu Bold"),local("Ubuntu-Bold"),url(/static/Ubuntu-Bold-aba9776d7cef01d06d97654e643ce50d.ttf) format("truetype")}@font-face{font-family:Lato;font-style:normal;font-weight:300;src:local("Lato Light"),local("Lato-Light"),url(/static/Lato-Light-ad9795e9e558f84030ad36c2ef3ab681.ttf) format("truetype")}@font-face{font-family:Lato;font-style:normal;font-weight:400;src:local("Lato Regular"),local("Lato-Regular"),url(/static/Lato-Regular-c45152a20fcaa8ae5d5611e947399dcc.ttf) format("truetype")}@font-face{font-family:Lato;font-style:normal;font-weight:700;src:local("Lato Bold"),local("Lato-Bold"),url(/static/Lato-Bold-a30435e0c5edc583b1f3552e48068e69.ttf) format("truetype")}@font-face{font-family:Lato;font-style:normal;font-weight:900;src:local("Lato Black"),local("Lato-Black"),url(/static/Lato-Black-01f5fcc5ad6ec24b74b9c5239e273226.ttf) format("truetype")}@font-face{font-family:Lato;font-style:italic;font-weight:400;src:local("Lato Italic"),local("Lato-Italic"),url(/static/Lato-Italic-4ffd11cfd26127dbd8c716fddeffa1e0.ttf) format("truetype")}@font-face{font-family:Roboto;font-style:normal;font-weight:400;src:local("Roboto"),local("Roboto-Regular"),url(/static/Roboto-Regular-38861cba61c66739c1452c3a71e39852.ttf) format("truetype")}@font-face{font-family:Roboto;font-style:normal;font-weight:700;src:local("Roboto Bold"),local("Roboto-Bold"),url(/static/Roboto-Bold-ad97d029a11d8b39692037e753d23d1f.ttf) format("truetype")}body .fixed.top{z-index:999}img{max-width:100%}body{overflow-x:hidden}body .showResults.item-finder>#plugin-search-form.HomeHeader{padding:.25rem .5rem}#plugin-search-form .SearchBox .SearchBtn,#plugin-search-form .SearchBox .ShowFilter{color:#fff!important}.SearchBox label.input-group{width:100%}.SearchBox .input-group .btn{border:1px solid #900}body .showResults.item-finder>.HomeHeader>.navbar{width:100%;padding:0 10.5rem 0 0}body .showResults.item-finder>.HomeHeader>.navbar>.nav,body .showResults.item-finder>.HomeHeader>.navbar>.nav>.SearchBox{width:100%;padding:0!important}body .showResults.item-finder>.HomeHeader>.navbar>.nav>.btn-group>button>i{line-height:1.5rem}body .showResults.item-finder>.HomeHeader>.navbar>.nav>.btn-group{position:absolute;right:0;top:0}body .showResults.item-finder>.HomeHeader>.navbar>.nav>.SearchBox .ShowFilter{width:18.6%!important;max-width:10rem!important}body .showResults.item-finder .filters

{top:5px;padding-top:1rem!important;margin-top:-1px;border-radius:0;box-shadow:-.25rem 0 #fff;border-left:none;border-top:none;left:.25rem}

body .showResults.item-finder .filters .row{border:none;padding:0}body .showResults.item-finder .filters .row>div{font-size:.75rem;padding:0 .5rem;overflow:hidden}body .showResults.item-finder .filters .row>div label{white-space:nowrap}body .showResults.item-finder .filters .Cols3{-webkit-column-count:1;column-count:1;-moz-column-count:1}body .showResults #plugin-search-form .nav>.btn-group{display:inline-block}body .showResults #plugin-search-form:before,body .showResults #plugin-search-form h1,body .showResults #plugin-search-form p{display:none}.filters .show-all{border:none;background:#168bb9;font-family:lato;padding:.15rem .5rem;margin-left:.5rem;font-size:.67rem;color:#fff;font-weight:200;border-radius:2px}.isFiltered .filters .show-all{display:inline-block}#pluginDependencies h2{font-size:1.2rem;margin-top:.7rem}.empty{opacity:.33}body a{color:#069}body a:visited{color:#7ac}body a:hover{color:#09c}body a:active{color:#c00}.NoLabels>.Categories label>input{display:none}.NoLabels>.Categories label>span{margin-left:0!important;color:#0275d8;cursor:pointer}body #grid-box{padding-top:30px}@media (min-width:992px){body #grid-box{padding-top:8px}}body #grid-box .NoLabels{padding:2rem 0;background:#e5f8ff}body #grid-box .NoLabels .Cols3{font-size:.85rem}body #grid-box .NoLabels .Cols3 label>span{margin-left:.5rem}body #grid-box .NoLabels .Entry-box{display:block;padding:.25rem 0;line-height:1rem;font-size:.85rem}body #grid-box .NoLabels .Entry-box a{cursor:pointer}body #grid-box .NoLabels legend{font-size:1.1rem}.update-link{margin:4rem 0}.update-link h6{margin-bottom:.25rem}#cb-item-finder-grid-box>.grid>.no-results{padding:.5rem;color:rgba(0,0,0,.667);display:block}.not-found-box{text-align:center}.not-found{margin:6rem 0;padding:1.5rem 0 1.5rem 8rem;position:relative;display:inline-block;text-align:left}.not-found h3{margin-bottom:.25rem}.not-found i{font-size:8rem;line-height:8rem;vertical-align:middle;color:rgba(0,0,0,.25);display:block;position:absolute;left:0;top:0}.not-found i.icon-plug{color:#000;font-size:6rem;left:.5rem;transform:scaleX(-1)}#plugin-spinner{display:block;text-align:center;padding:5rem 0;position:absolute;left:0;right:0}#plugin-spinner>.swing{display:inline-block;padding:1rem}#plugin-spinner .icon-jenkins{display:block;font-size:10.5rem}.swing div{display:inline-block;height:32px;width:32px;border-radius:50%;border:1px solid #69c;background:#fff;box-shadow:inset 0 0 1px #039,inset 0 0 0 1px #fff,0 5px 3px -2px rgba(0,0,0,.15),inset -5px -5px 7px 1px #168bb9,inset -4px -6px 10px 10px #69c}@-webkit-keyframes ball-l{0%,50%

{transform:rotate(0) translateX(0)}

to{transform:rotate(50deg) translateX(-2.5em)}}@keyframes ball-l{0%,50%

{transform:rotate(0) translateX(0)}

to{transform:rotate(0deg) translateX(-2.5em)}}@-webkit-keyframes ball-r{0%

{transform:rotate(-50deg) translateX(2.5em)}

50%,to{transform:rotate(0) translateX(0)}}@keyframes ball-r{0%

{transform:rotate(0deg) translateX(2.5em)}

50%,to{transform:rotate(0) translateX(0)}}@-webkit-keyframes shadow-l-n{0%,50%

{opacity:.5;transform:translateX(0)}

to{opacity:.125;transform:translateX(-1.75em)}}@keyframes shadow-l-n{0%,50%

{opacity:.5;transform:translateX(0)}

to{opacity:.125;transform:translateX(-1.75em)}}@-webkit-keyframes shadow-r-n{0%

{opacity:.125;transform:translateX(1.75em)}

50%,to{opacity:.5;transform:translateX(0)}}@keyframes shadow-r-n{0%

{opacity:.125;transform:translateX(1.75em)}

50%,to{opacity:.5;transform:translateX(0)}}.swing-l{-webkit-animation:ball-l .425s ease-in-out infinite alternate;animation:ball-l .425s ease-in-out infinite alternate}.swing-r{-webkit-animation:ball-r .425s ease-in-out infinite alternate;animation:ball-r .425s ease-in-out infinite alternate}.maintainers>.maintainer{display:block}.container-fluid.padded{padding:3rem 4rem}#pluginPage #grid-box{font-size:.85rem}#pluginPage #grid-box .gutter{background:#eee;padding:2rem}#pluginPage #grid-box .gutter>.btn{display:block;text-align:left;padding:.5rem 1rem .75rem 3.5rem;position:relative;margin-bottom:1rem}#pluginPage #grid-box .gutter>.btn i{font-size:2.25rem;position:absolute;left:.75rem;top:.5rem}#pluginPage #grid-box .gutter>.btn>span{font-size:1.1rem;line-height:1.3rem;font-weight:500}#pluginPage #grid-box .gutter>.btn>.v{display:block;font-weight:200;font-size:.75rem;white-space:normal}#pluginPage #grid-box .gutter .lbl{display:inline-block;margin-right:.5rem}##pluginPage #grid-box .gutter .label-link a{display:block;line-height:1.5rem;padding:4px 0}#pluginPage #grid-box .gutter .chart{margin:1rem 0 2rem}#pluginPage #grid-box{margin-left:15px;margin-right:15px}#pluginPage #grid-box .download{margin:2rem 0 2rem -.5rem}#pluginPage #grid-box .badge-box{display:inline-block}#pluginPage #grid-box .badge-box>.badge{background:no-repeat top;background-size:3rem;display:inline-block;height:3rem;width:3rem;overflow:hidden;vertical-align:middle;text-indent:99rem;white-space:nowrap;margin:0 -.5rem 0 .5rem}#pluginPage #grid-box .badge-box .badge.warning{background-image:url(data:image/svg+xml;base64,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);background-size:2.5rem}#pluginPage #grid-box .dialog .badge-box>.badge.warning.inactive{mix-blend-mode:luminosity;opacity:.5}.row.flex{display:flex}h1.title .v{color:#999;font-size:1rem;font-weight:200;margin:0 0 0 .5rem;position:relative;top:.25rem;vertical-a...