Plugin Not Working After Update

Hi Everyone,

Can anybody here please help me. I have updated my plugin and from the time i have updated it, i am not able to create new links. Everything works fine till i click the create link button. When i click it, a circle starts revolving and the process never ends. For more details i have provided the screenshot below please check it.

Here’s a screenshot of that page.
https://prnt.sc/nn9ugm

Please help me out. Previously i reverted the plugin to previous version but now after WordPress 5.2 update old version has stopped working and now i am stuck.