Scripting error with post processing

had to reset my computer and upon reinstalling unity 2019.1.3 and opening the project we’re working on i got this error:

“Assets\Scripts\PostProcessingRenderScaleControl.cs(17,34): error CS0117: ‘PostProcessRenderContext’ does not contain a definition for ‘postProcessRenderScale’”

can’t work out what’s going on here. any ideas?

thanks in advance

tom

Reinstall post-processing via package manger?