Could it be possibly caused by other plugins?
Yes, it’s possible, but i doubt it’s the case. To get sure, you can deactivate all plugins except BP and track down a culprit.
If the page or the whole site is blank after adding custom code, it’s generally due to missing tags or a php error.
Errors can also be generated by software who modify the file format. For example if you use the WP editor to add something to bp-custom, and you’re on the visual tab, you get weird results. Same thing if you edit bp-custom locally with Word or other such text-editor….
More about this here.
