Swagger broken after upgrade to 2.3.5. Get Failed to load API definition.

[A_Knapp]

Hi,

We have just upgraded from Magento 2.3 CE to 2.3.5 and we are unable to get the default services from swagger, it returns

Get Failed to load API definition.

Internal Server Error http://{domain}/rest/all/schema?services=all

The link it provided https://validator.swagger.io/validator/debug?url=http://{domain}/rest/all/schema?services=all

Result:-

{"schemaValidationMessages":[{"level":"error","message":"Can't read from file http://{domain}/rest/all/schema?services=all"}]}

Replaced our domain in the results above with {domain} for security

Bit of a newbie on this, any idea on how to debug  or what log files to look at?

Thanks

Andrew

[dineshprim]

Any luck in resolving this error. I am getting same error.

[Rakesh_Testing]

Just you need to disable some of the vendor Bundle modules only.

php bin/magento module:disable --clear-static-content Dotdigitalgroup_Email Dotdigitalgroup_Chat

Then upgrade hole site once and it will work perfectly.

[venkatesanc6dd]

Yes i got the resolved the issue ..