AlphaFold crash

Introduction

This bug was previously reported here: https://github.com/googlecolab/colabtools/issues/3687
It seems that they recognized the bug, but that you are better suited to solve it.
This is the recommendation that I received:
"--> File an issue over at https://github.com/sokrypton/ColabFold/issues - this is maintained by a 3rd party"

Expected Behavior

Protein structure estimation

Current Behavior

AlphaFold systematically crashes at the step described below

Steps to Reproduce (for bugs)

Please make sure to reproduce the issue after a "Factory Reset" in Colab.
If running locally ypdate you local installation colabfold_batch to the newest version.
Please provide your input if you can share it.

I am using AlphaFold (here: https://colab.research.google.com/github/sokrypton/ColabFold/blob/main/beta/AlphaFold2_advanced.ipynb#scrollTo=bQe3KeyTcv0n) with exactly the same parameters, almost all default parameters, for several months, changing only the protein sequence. For the first time, the program crashes systematically at the step "Run alphafold"
and issues the following error message:
Running model_1_ptm_seed_0: 0%
0/1 [elapsed: 00:32 remaining: ?]

AttributeError Traceback (most recent call last)
in <cell line: 67>()
65 # run alphafold
66 ###########################
---> 67 outs, model_rank = cf_af.run_alphafold(feature_dict, opt, runner, num_models, num_samples, subsample_msa,
68 rank_by=rank_by, show_images=show_images)
47 frames
[... skipping hidden 12 frame]

[... skipping hidden 9 frame]

[... skipping hidden 8 frame]
/content/alphafold/alphafold/model/utils.py in mask_mean(mask, value, axis, drop_mask_channel, eps)
54 elif axis is None:
55 axis = list(range(len(mask_shape)))
---> 56 assert isinstance(axis, collections.Iterable), (
57 'axis needs to be either an iterable, integer or "None"')
58
AttributeError: module 'collections' has no attribute 'Iterable'
The crash is reproducible here: https://colab.research.google.com/github/sokrypton/ColabFold/blob/main/beta/AlphaFold2_advanced.ipynb#scrollTo=bQe3KeyTcv0n
using for example this sequence, although any sequence would do it: YSGTARYHTQMLRVREFIRFHQIPNPLRQRLEEYFQHAWSYTNGIDMNAVLKGFPECLQADICLHLNRSLLQHCKPFRGATKGCLRALAMKFKTTHAPPGDTLVHAGDLLTALYFISRGSIEILRGDVVLAILGKNDIFGEPLNLYARPGKSNGDVRALTYCDLHKIHRDDLLEVLDMYPEFSDHFWSSLEITFNLR

ColabFold Output (for bugs)

Please make sure to also post the complete ColabFold output. You can use gist.github.com for large output.
Reported in the previous section

Context

Providing context helps us come up with a solution and improve our documentation for the future.

Your Environment

Include as many relevant details about the environment you experienced the bug in.

• Git commit used
• If you run it on a local system. Please add the server specifications
• Operating system and version:

I run it on the webpage as explained above.
Other details:
MACOS 11.7.6
the issue is independent from the internet browser: Safari, Firefox and google chrome

Start by running the linked AlphaFold2_advanced.ipynb notebook after a Colab factory reset and confirm whether the crash still occurs during the “Run alphafold” step. Then inspect alphafold/alphafold/model/utils.py at mask_mean, especially the failing axis check. Done means the supplied sequence completes that step without the reported AttributeError.