This is the error which comes in developer tools when i try to install the demo: Uncaught SyntaxError: Unexpected token < in JSON at position 0
at JSON.parse (<anonymous>)
at Function.n.parseJSON (load-scripts.php?c=0&load[chunk_0]=jquery-core,jquery-migrate,utils,moxiejs,plupload&ver=5.4.2:formatted:3713)
at Function.a.parseJSON (load-scripts.php?c=0&load[chunk_0]=jquery-core,jquery-migrate,utils,moxiejs,plupload&ver=5.4.2:formatted:4645)
at Object.complete (demos.min.js?ver=1.0:1)
at i (load-scripts.php?c=0&load[chunk_0]=jquery-core,jquery-migrate,utils,moxiejs,plupload&ver=5.4.2:formatted:1332)
at Object.fireWith (load-scripts.php?c=0&load[chunk_0]=jquery-core,jquery-migrate,utils,moxiejs,plupload&ver=5.4.2:formatted:1386)
at x (load-scripts.php?c=0&load[chunk_0]=jquery-core,jquery-migrate,utils,moxiejs,plupload&ver=5.4.2:formatted:4023)
at XMLHttpRequest.c (load-scripts.php?c=0&load[chunk_0]=jquery-core,jquery-migrate,utils,moxiejs,plupload&ver=5.4.2:formatted:4226)