Error previewing frame

Hi everyone. I'm trying to import animations into a sprite, which are .png frames exported from the animation software, Synfig. I am able to import about two full animations (each with opposite directions) and can preview the frame, but when I try to import another full animation and attempt to preview, the progress bar always stays at 27% for about five minutes, until this error comes up:"Construct encountered an error in the display engine. Please report this problem to the application developer. Failed to create texture (0x8007000e)" I've tried a few other formats besides .png's, but nothing seems to be working. Anyone have any ideas? Thanks.

See if you can Import the first set(the one that worked) more than three times.

Then start construct again and try importing the one that failed.

Okay, I tried what you said and the error came up after importing the first set a third time. It seems if I just import any third animation the error comes up. The loading times for me are also pretty long. I don't think .png's are really big, but is there another picture format that might be better? Any other ideas? Thanks.

how big are these images?

Each is about 60 KB, with around 30 frames per animation. Is that way too much for Construct? I've tried a couple other formats such as .bmp and .jpeg, but still got the error message.