Sonarr not starting after updating to V4

Sonarr won’t load after updating from V3 to V4.

It’s on Ubuntu 20.04 and I have the backup file from V3.

I’ve tried removing all directories and reinstalling directly from Sonarr

Tried installing from PIjarr too but no joy

I can see SERVICE is running but with following errors.

Apr 10 08:48:36 ubuntu-vod Sonarr[2252]: at Microsoft.AspNetCore.Hosting.GenericWebHostBuilder.<>c__DisplayClass15_0.b__1(IApplicationBuilder app)
Apr 10 08:48:36 ubuntu-vod Sonarr[2252]: at Microsoft.AspNetCore.Mvc.Filters.MiddlewareFilterBuilderStartupFilter.<>c__DisplayClass0_0.g__MiddlewareFilterBuilder|0(IApplicationBuilder builder)
Apr 10 08:48:36 ubuntu-vod Sonarr[2252]: at Microsoft.AspNetCore.Hosting.GenericWebHostService.StartAsync(CancellationToken cancellationToken)
Apr 10 08:48:36 ubuntu-vod Sonarr[2252]: at Microsoft.Extensions.Hosting.Internal.Host.StartAsync(CancellationToken cancellationToken)
Apr 10 08:48:36 ubuntu-vod Sonarr[2252]: at Microsoft.Extensions.Hosting.HostingAbstractionsHostExtensions.RunAsync(IHost host, CancellationToken token)
Apr 10 08:48:36 ubuntu-vod Sonarr[2252]: at Microsoft.Extensions.Hosting.HostingAbstractionsHostExtensions.Run(IHost host)
Apr 10 08:48:36 ubuntu-vod Sonarr[2252]: at NzbDrone.Host.Bootstrap.Start(String args, Action`1 trayCallback) in ./Sonarr.Host/Bootstrap.cs:line 80
Apr 10 08:48:36 ubuntu-vod Sonarr[2252]: at NzbDrone.Console.ConsoleApp.Main(String args) in ./Sonarr.Console/ConsoleApp.cs:line 45
Apr 10 08:48:36 ubuntu-vod Sonarr[2252]: Press enter to exit…
Apr 10 08:48:37 ubuntu-vod Sonarr[2252]: Non-recoverable failure, waiting for user intervention…

I have read about database corrupt on this website but I don’t know how to recover. If any one can help, will compensate for your time too.

Thanks

Please upload the output from Sonarr’s log file and link it here. Nothing here indicates a DB corruption issue, but not sure what was lost in truncation.