Oracle XML Database database invalid, how to validate/recompile … can i drop and recreate it. Please suggest

The installed components and their status,

Oracle Database Catalog Views Valid Oracle Database Packages and Types Valid Oracle XML Database Loaded

The XML Database component states as loaded, as there are invalid objects.

–> Tried to recompile invalid objects by running utlrp.sql but no use, still the invalid objects exist.

–> Unable to expdp/impdp due to sys objs being invalid with the below error,

ORA-04063: package body “SYS.DBMS_METADATA” has errors 04063. 00000 – “%s has errors” *Cause: Attempt to execute a stored procedure or use a view that has errors. For stored procedures, the problem could be syntax errors or references to other, non-existent procedures. For views, the problem could be a reference in the view’s defining query to a non-existent table. Can also be a table which has references to non-existent or inaccessible types. *Action: Fix the errors and/or create referenced objects as necessary

Sudden drop in rankings, don’t undertstand why

Recently I came back to my site that I didn’t do any SEO for since a few years. First thing I noticed is that Google was no longer considering it mobile friendly. So I updated the mobile template to bring the site up to the Google requirements. Also I registered a trial account with one Google rank checking tool. That’s all what I did. And right after I did that, around October 20, my site’s rankings have dropped for all important keywords and for all platforms (desktop, mobile, tablet). This resulted in a significant visitor drop as seen in the graph below.
It can’t be a coincidence but I am really baffled. I don’t see any reason why the rankings could have dropped because of what I did. I am even getting a weird idea that the Google ranking service might have done something to force me to buy their paid subscription. I know that sounds weird but really I can’t find a more logical explanation.
Does anybody have an idea why this might have happened?

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SharePoint Framework/ issue/ drop down change event on web part/

I want to use drop down control on SharePoint framework webpart(done) and on change event to call some method/ some rest api and so.but it is not allowing.

I did not find any article where spfx web part is shown with drop down. whereever I found drop down, it was in web part edit mode.I am sure end user will laugh if I go and say hay edit web part, and choose drop down to change the data.

some body have achieved ?

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