Tomcat instructions are documented here -- Application Server Install

Its hard for commnity to suggest a fix without more information. Please post any log messages that you are seeing

After confirming whit team - we ship the pdfg module as  bundles  with Forms Add on package.

See if this doc helps you -- https://www.microsoft.com/en-us/translator/business/aem/

FROM OSGi docs --The OSGi Declarative services specification defines three types of components:Immediate Components are immediately created when the providing bundle is started and may or may not provide servicesDelayed Components provide services but are only created when used by a service consumer...

See this thread - you may be facing same issue.  Re: RTE dialog field not working in 6.3.3 I just tested package on 6.4 too and it works nicely...

What version of AEM are you using. I have never seen a fresh instance not run this package as shown in the video in this thread - which was done a fresh AEM server. 

Excellent response!

As you are aksing about MSM - watch this ATCE session here om MSM - they cover a lot of community questions in this session: Scott's Digital Community: January 2018 session of Ask the AEM Community Experts Also a GEMS translation session here will be helpful -- Adobe Experience Manager Help | AEM 6....

This could be a bug in the upgrade. If the RTE is not working as shown in the video:Then something needs to be fixed at the software level.Please report this to AEM Customer Care by raising a support ticket so it can be fixed.