Forum Discussion
Power BI Report Server Upgrade: PowerBIReportServer.exe mscorlib System.MissingMethodException
I fixed this by upgrading the version of .Net Framework on the server.
Retrospectively I have found that requirements for the January 2020 version of Power BI Report Server specify v4.7
see https://docs.microsoft.com/en-us/power-bi/report-server/system-requirements
This was not something mentioned on
https://docs.microsoft.com/en-us/power-bi/report-server/upgrade
which I was using to apply the upgrade.
The server had v4.6.x.
I upgraded to v4.7.2.
The installation now completes without error
What pointed me to the version of .Net Framework as being the issue was that I tried the install on a server which had an even older version installed (4.5.x from memory).
Running the install on that produced a message to say the version was too old.
I guess for some reason the install exe could not work out the version installed on the server I was having the problem with.
I fixed this by upgrading the version of .Net Framework on the server.
Retrospectively I have found that requirements for the January 2020 version of Power BI Report Server specify v4.7
see https://docs.microsoft.com/en-us/power-bi/report-server/system-requirements
This was not something mentioned on
https://docs.microsoft.com/en-us/power-bi/report-server/upgrade
which I was using to apply the upgrade.
The server had v4.6.x.
I upgraded to v4.7.2.
The installation now completes without error
What pointed me to the version of .Net Framework as being the issue was that I tried the install on a server which had an even older version installed (4.5.x from memory).
Running the install on that produced a message to say the version was too old.
I guess for some reason the install exe could not work out the version installed on the server I was having the problem with.