Step 1
Change version of MySql.Data to MySQL version, from 8.0.20 to current 8.0.32
<ItemGroup>
<PackageReference Include="FluentMigrator" Version="3.2.6" />
<PackageReference Include="FluentMigrator.Runner" Version="3.2.6" />
<PackageReference Include="linq2db" Version="2.9.8" />
<PackageReference Include="MySql.Data" Version="8.0.32" />
<PackageReference Include="System.Net.NameResolution" Version="4.3.0" />
</ItemGroup>
Step 2. I build solution in "Release" mode
Step 3. I copy Nop.Data.dll from ..\Presentation\Nop.Web\bin\Release\netcoreapp3.1 to Root of web folder
Step 4. Restart Nopcommerce Service