Manual upgrading from 2.2.13 to 2.2.15 - compileAst() error

[yar]

When doing manual upgrade process from v2.2.13 to 2.2.15 I am getting error like:

TypeError: XF\Template\Compiler::compileAst(): Argument #1 ($ast) must be of type XF\Template\Compiler\Ast, bool given, called in /opt/APP/public/community/src/XF/Service/Template/Compile.php on line 28 in src/XF/Template/Compiler.php at line 241

1. XF\Template\Compiler->compileAst() in src/XF/Service/Template/Compile.php at line 28...

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Manual upgrading from 2.2.13 to 2.2.15 - compileAst() error

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