It’s not clear to me what’s going wrong here, as I just tested File ‣ Share ‣ EagleFiler Import in Safari, and it worked with Web archive, RTF, and PDF formats. EagleFiler should be doing the switch to Nitter automatically. Perhaps there is some information in the log that would explain why the pages were blank, or perhaps it would help to switch to a different Nitter instance.
Some other ways of importing that you could try:
- Press the capture key in Safari.
- Paste the Twitter URL into the Import URLs sheet.
- Drag and drop the Twitter URL into EagleFiler.
- Select the text in Safari and press Command-Shift-1 to invoke the EagleFiler: Import service.
The first three ways also involve EagleFiler loading the URL so they may encounter the same problem—but, if not, that would point to a problem with the Share command rather than with fetching the page.
The last way will transfer the content directly, without accessing the network, so it should be more reliable.