If you are troubled with the above errors in SharePoint while publishing and viewing the excel services forms in browser then I believe you are in the right place. I am not sure if my guidelines will solve your problem but at least it solved my issues.
Resolution:
1. In SharePoint Central Administration, go to 'Manage this farm's shared services'
2. Select your shared service. (Default is SharedServices1)
3. In 'Excel Services Settings' select Edit Excel Services settings.
4. Ensure that File Access method is Process Account. Click OK.
5. Back in 'Excel Services Settings' select 'Trusted File Locations'
6. Add a new Trusted file Location:
> URL: Specify the report library or the entire portal
> Location Type: Windows SharePoint Services
> Children: Trusted
If you have any queries/questions regarding the above mentioned information then please let me know.
I would be more than happy to help you as well as resolves your issues, thank u