Please delete the file /Setup/ProviderConfig/indexbuilders/webstoreproductindexbuilder.config
WebStore is not implemented in pgsql and I did not realize the presence of this file would cause this error but now I realize it from thinking through it.
Then it may be best to delete all rows from the mp_IndexingQueue and mp_TaskQueue tables then immediately recycle the app by touching web.config
I think what happens is when it first tries to rebuild the site search index, the presence of this file makes it invoke the indexbuilder for webstore, but webstore is not implemented for pgsql so it throwsthis error. I only recently integrated the web store products into the search so I introduced this bug in this version for db platforms where webstore isn't implemented yet.
For the next error if you have a relevant error thats fine, all that .ashx service does is read and render the xml from /ClientScript/mojofckstyle.xml
Have you pasted the url http://internal.bio3.pt/bio3cms/Services/EditorStyles.ashx into your browser? What happens there?
About the skins, if you view the source of the page and are using one of the included skins (please don't try to solve it with those old skins active), then look for the url of the main css file, it should be .../csshandler.ashx?... Copy the fullurl and paste into the browser, do you see css or an error?
Maybe there is some problem in general for .ashx, maybe its not registered correctly for that extension.
Also, since your site is running in a sub folder virtual directory /bio3cms/ see if there is another web.config file 1 folder up in the folder that corresponds to the root. If there is one it can be interfering.
Hope it helps,
Joe