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Here showing HTTP error 403, there may have confliction between other plugins, you can also deactivate or activate other plugins for checking,

The two most likely causes of the 403 Forbidden Error on WordPress are:

Corrupt .htaccessfile
Incorrect file permissions
It’s also possible that you’re seeing the error because of an issue with a plugin that you’re using at your site. In this article, we’ll show you how to troubleshoot all of these potential issues.

403 Forbidden Error Variations
Like many other HTTP status codes, there are a lot of different variations for how this error code presents itself.

Here are some common variations that you might come across:

“Forbidden – You don’t have permission to access / on this server”
“403 – Forbidden: Access is denied”
“Error 403 – Forbidden”
“403 – Forbidden Error – You are not allowed to access this address”
“403 Forbidden – nginx”
“HTTP Error 403 – Forbidden – You do not have permission to access the document or program you requested”
“403 Forbidden – Access to this resource on the server is denied”
“403. That’s an error. Your client does not have permission to get URL / from this server”
“You are not authorized to view this page”
“It appears you don’t have permission to access this page.”
If you’re on an Nginx server, it will look like this below. Basically, if you see any mention of “forbidden” or “not allowed to access”, you’re probably dealing with a 403 Forbidden error.

please check those issues, or you may contact with hosting service provider for the resoution

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