comp named 'comp name 0' is missing (Need your help)

[Amiiii]

while applying some tracking effect effects I got this error and the effect is not applied after many tries. please help me a screenshot of the error attached, thanks

[Peru Bob]

I've moved this from the Using the Community forum (which is the forum for issues using the forums) to the AAfter Effects forum so that proper help can be offered.

[Jose Panadero]

We need some extra screen captures of your project panel and the timeline panel. On the timeline panel press UU to reveal modified properties.

[Rick Gerard]

Cropped screenshots of expression error messages are useless for diagnosing problems. Screenshots shared using the Drag and Drop here option is annoying to look at. Please drag them to the reply form or use the toolbar to embed them 

The only thing I know is that you have an expression somewhere that is looking for a comp named 0 that you don't have in your project. I know nothing about your workflow or your comp structure. Normally, when you motion track anything an expression is not applied to the layer. 

Please share workflow details and a screenshot that shows the modified properties of the layer giving you problems. Reveal those modified properties by selecting the problem layer and pressing the U key twice, then embed the screenshot so we have some idea of what you are doing.