Have no idea, how it can helps me? )
I talk about package installer on MODX site i made, like /manager/?a=workspaces
I can come this page and look all of components, also can download them.
But when click on downloaded package for install it, i get this strange error and can't find the same problem, anywhere.
Might you have lost the Package files and folders that normally reside in the following folders during the course of the upgrade?
/core/components
/core/packages
See points 7 and 8 in this article:
https://www.sepiariver.ca/blog/modx-web/upgrading-modx-advanced-installs/
For example the VersionX extra should have the following files and folders.
/core/components/versionx (FOLDER)
/core/packages/versionx-2.1.2-pl (FOLDER)
/core/packages/versionx-2.1.3-pl (FOLDER)
/core/packages/versionx-2.1.2-pl.transport.zip
/core/packages/versionx-2.1.3-pl.transport.zip
Glad it helped and that you have it working again
Try to refresh your manager (browser), reload with CTRL...