Can’t Add Posts

I’m on the latest version of the plugin and it was working fine. Except today I wanted to add a new slider where the Add Post icon is not working. The scenario as follows:
1. I create a new slider
2. Give it a title
3. On the Static post sliders, I press on Add Posts and nothing happens.

I tried edititing an existing slider but still nothing happens

here is the error from the console

load-scripts.php?c=1&load[]=jquery-core,jquery-migrate,utils,plupload&ver=4.8:9 JQMIGRATE: Migrate is installed, version 1.4.1
admin.php?page=sliders_wdps:966 Uncaught SyntaxError: Invalid or unexpected token
admin.php?page=sliders_wdps:1294 .listing is not a directory.
admin.php?page=sliders_wdps:1551 .listing is not a directory.
wdps.js?ver=1.0.45:472 Uncaught ReferenceError: rl_butt_dir is not defined
    at HTMLDivElement.<anonymous> (wdps.js?ver=1.0.45:472)
    at Function.each (load-scripts.php?c=1&load[]=jquery-core,jquery-migrate,utils,plupload&ver=4.8:2)
    at a.fn.init.each (load-scripts.php?c=1&load[]=jquery-core,jquery-migrate,utils,plupload&ver=4.8:2)
    at wdps_onload (wdps.js?ver=1.0.45:470)
    at HTMLDocument.<anonymous> (admin.php?page=sliders_wdps:2657)
    at i (load-scripts.php?c=1&load[]=jquery-core,jquery-migrate,utils,plupload&ver=4.8:2)
    at Object.fireWith [as resolveWith] (load-scripts.php?c=1&load[]=jquery-core,jquery-migrate,utils,plupload&ver=4.8:2)
    at Function.ready (load-scripts.php?c=1&load[]=jquery-core,jquery-migrate,utils,plupload&ver=4.8:2)
    at HTMLDocument.K (load-scripts.php?c=1&load[]=jquery-core,jquery-migrate,utils,plupload&ver=4.8:2)
(anonymous) @ wdps.js?ver=1.0.45:472
each @ load-scripts.php?c=1&load[]=jquery-core,jquery-migrate,utils,plupload&ver=4.8:2
each @ load-scripts.php?c=1&load[]=jquery-core,jquery-migrate,utils,plupload&ver=4.8:2
wdps_onload @ wdps.js?ver=1.0.45:470
(anonymous) @ admin.php?page=sliders_wdps:2657
i @ load-scripts.php?c=1&load[]=jquery-core,jquery-migrate,utils,plupload&ver=4.8:2
fireWith @ load-scripts.php?c=1&load[]=jquery-core,jquery-migrate,utils,plupload&ver=4.8:2
ready @ load-scripts.php?c=1&load[]=jquery-core,jquery-migrate,utils,plupload&ver=4.8:2
K @ load-scripts.php?c=1&load[]=jquery-core,jquery-migrate,utils,plupload&ver=4.8:2
load-scripts.php?c=1&load[]=hoverIntent,common,admin-bar,svg-painter,heartbeat,wp-auth-check,jquery…:246 Uncaught TypeError: Cannot read property 'hasClass' of undefined
    at HTMLDocument.<anonymous> (load-scripts.php?c=1&load[]=hoverIntent,common,admin-bar,svg-painter,heartbeat,wp-auth-check,jquery…:246)
    at HTMLDocument.dispatch (load-scripts.php?c=1&load[]=jquery-core,jquery-migrate,utils,plupload&ver=4.8:3)
    at HTMLDocument.r.handle (load-scripts.php?c=1&load[]=jquery-core,jquery-migrate,utils,plupload&ver=4.8:3)
    at Object.trigger (load-scripts.php?c=1&load[]=jquery-core,jquery-migrate,utils,plupload&ver=4.8:3)
    at Object.a.event.trigger (load-scripts.php?c=1&load[]=jquery-core,jquery-migrate,utils,plupload&ver=4.8:9)
    at HTMLDocument.<anonymous> (load-scripts.php?c=1&load[]=jquery-core,jquery-migrate,utils,plupload&ver=4.8:3)
    at Function.each (load-scripts.php?c=1&load[]=jquery-core,jquery-migrate,utils,plupload&ver=4.8:2)
    at a.fn.init.each (load-scripts.php?c=1&load[]=jquery-core,jquery-migrate,utils,plupload&ver=4.8:2)
    at a.fn.init.trigger (load-scripts.php?c=1&load[]=jquery-core,jquery-migrate,utils,plupload&ver=4.8:3)
    at Object.<anonymous> (load-scripts.php?c=1&load[]=hoverIntent,common,admin-bar,svg-painter,heartbeat,wp-auth-check,jquery…:245)

Looking forward for your support