We are using visualforce page to generate .docx file in salesforce. Everything works fine if we try with .doc and .xls files but we are facing some issues while generating only on docx and xlsx files, for doc and xl files its works fine. While opening downloaded it some error messages are throwing and only after clicking on those popup boxes we are unable to view the files.

We have tried mime-type "application/vnd.openxmlformats-officedocument.wordprocessingml.document" with no luck. You can find mime-type reference from below link:

https://www.sitepoint.com/web-foundations/mime-types-summary-list

If visualforce doesn't support to generate .docx or .xlsx file please help me to find any doc which stated that?

We are using visualforce page to generate .docx file in salesforce. Everything works fine if we try with .doc and .xls files but we are facing some issues while generating only on docx and xlsx files, for doc and xl files its works fine. While opening downloaded it some error messages are throwing and only after clicking on those popup boxes we are unable to view the files.

We have tried mime-type "application/vnd.openxmlformats-officedocument.wordprocessingml.document" with no luck. You can find mime-type reference from below link:

https://www.sitepoint.com/web-foundations/mime-types-summary-list

If visualforce doesn't support to generate .docx or .xlsx file please help me to find any doc which stated that?

Invalid property [hideChatterActions] in component [force:highlightsPanel] while we deploy from sandbox to production. This is coming from all the lighting pages in migration

How can we get rid of this error ? 

We are using visualforce page to generate .docx file in salesforce. Everything works fine if we try with .doc and .xls files but we are facing some issues while generating only on docx and xlsx files, for doc and xl files its works fine. While opening downloaded it some error messages are throwing and only after clicking on those popup boxes we are unable to view the files.

We have tried mime-type "application/vnd.openxmlformats-officedocument.wordprocessingml.document" with no luck. You can find mime-type reference from below link:

https://www.sitepoint.com/web-foundations/mime-types-summary-list

If visualforce doesn't support to generate .docx or .xlsx file please help me to find any doc which stated that?