Weird issue in TinyMCE - WIRIS

Question

I am using Tinymce wiris editor to add equation. But the click button is not working. I checked the console and it show this error

plugin.min.js

plugin.min.js:3353 Uncaught DOMException: Failed to execute 'getRangeAt' on 'Selection': 0 is not a valid index.
at e.value (http://localhost:8080/equation/tinymce/plugins/tiny_mce_wiris/plugin.min.js:3353:117)
at e.value (http://localhost:8080/equation/tinymce/plugins/tiny_mce_wiris/plugin.min.js:3316:81)
at t.value (http://localhost:8080/equation/tinymce/plugins/tiny_mce_wiris/plugin.min.js:3564:22)
at t.value (http://localhost:8080/equation/tinymce/plugins/tiny_mce_wiris/plugin.min.js:3559:27)
at t.value (http://localhost:8080/equation/tinymce/plugins/tiny_mce_wiris/plugin.min.js:3760:51)
at e.value (http://localhost:8080/equation/tinymce/plugins/tiny_mce_wiris/plugin.min.js:2517:28)
at e.value (http://localhost:8080/equation/tinymce/plugins/tiny_mce_wiris/plugin.min.js:2812:72)

I checked the plugin.min.js file. but unable to find any issues there. Thanks in advance

I faced the same issue a while ago. Try clicking anywhere inside the TinyMCE editor section before clicking the okay button in WIRIS popup. it solved my issue. — sarath s rajendran, Nov 08 '19 at 04:13
@sarathsrajendran thanks for the comment. It worked. But its not a permanent solution though. Also, its hard to explain this to clients :-) — Sanchia Peter Thomas, Nov 08 '19 at 04:24
I know. If you could validate the get range before calling it may solve the issue. — sarath s rajendran, Nov 08 '19 at 04:27

Weird issue in TinyMCE - WIRIS

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