Microsoft Authentication Error

Hello Developers,
I’m trying to implement "Microsoft Modern Authentication " with reference of “End of support for Basic Authentication access to Exchange Online API’s for Office 365 customers - #33 by sayan0020”.
But i’m getting below error while loading EXTERNAL OAUTH CONNECTION module.

[17-Dec-2022 18:58:13 Asia/Kolkata] PHP Warning: include(): Failed opening ‘’ for inclusion (include_path=‘C:\inetpub\wwwroot\smqa;C:\inetpub\wwwroot\smqa\include/…;.;C:\php\pear’) in C:\inetpub\wwwroot\smqa\vendor\smarty\smarty\libs\Smarty.class.php on line 1929
[17-Dec-2022 18:58:13 Asia/Kolkata] PHP Warning: include(): Filename cannot be empty in C:\inetpub\wwwroot\smqa\vendor\smarty\smarty\libs\Smarty.class.php on line 1929

also when I trying to create New Personal Inbound Email Account getting error