The Web Parts are missing from the Ribbon Category when being viewed from the Web Part Manager.

The Web Parts are missing from the Ribbon Category when being viewed from the Web Part Manager.

“Invalid XML data” error in qChart
The cross site lookup is displayed as follows:
http://site/Lists/People_Picker;#People:#2
How to display the value of the field
People picker configured as cross-site lookup. Gets the following error “Invalid data has been used to update the list item. The field you are trying to update may be read only” when the filed has “Person or Group”
Where to go for advice, configuration recommendations, walkthroughs and how to questions.
EzEdit screen not opening in top layer of page in Internet Explorer 7 when accessing the Quest webpart from the context menu under SharePoint 2010
“The following error occurs: Unable to send the email. There maybe a connection issue, the mail server is down or the SMTP Server address in web.config is not configured correctly”
“[MissingWebPart] WebPart class [baf5274e-a800-8dc3-96d0-0003d9405663] is referenced [23] times in the database [SharePoint_AdminContent_XXXXX], but is not installed on the current farm. Please install any feature/solution which contains this web part. One or more web parts are referenced in the database”
Another IDs in the error message:
8d6034c4-a416-e535-281a-6b714894e1aa
9f56656f-6aa3-0d55-a812-711bf65864ea
874f5460-71f9-fecc-e894-e7e858d9713e
A lot of issues are caused by not configured web.config file:
“Unable to add selected web part(s)”
“qSIListForm”: Cannot import this Web Part”
The Quest Web Parts for SharePoint ezLearn Computer-Based Training (CBT) enables customers to get up to speed quickly with the Web Parts so they can simplify SharePoint development and build rich SharePoint applications without custom code.
The Quest Web Parts CBT consists of a pre-configured SharePoint environment via a content database backup, a series of worked examples and training exercises for each web part, and links to quick-start videos showing how to complete the exercises.