[bug]: IP Adapter always triggers re-install (and fails)

[Tobias-Reich]

Is there an existing issue for this problem?

• I have searched the existing issues

Operating system

Windows

GPU vendor

Nvidia (CUDA)

GPU model

RTX4080

GPU VRAM

17GB

Version number

5.2 -5.6

Browser

Firefox

Python dependencies

No response

What happened

Using any IP Adapter always triggers a reinstall and fails.

1. Installed the latest version.
2. adding an IP Adapter with a reference image
3. strat generation

Now the log states:
[InvokeAI]::WARNING --> The image encoder required by this IP Adapter (IP Adapter SD1.5 Image Encoder) is not installed. Downloading and installing now. This may take a while.

The IP Adapter is downloaded and tried to install to invokeai\models\any\clip_vision in the folder "IP Adapter SD1"
However once it is downloaded I get the error message there is a model already installed (even though it was just downloaded and put there).

The logs look like that:

[InvokeAI]::ERROR --> Error while fetching CLIP Vision Image Encoder
[InvokeAI]::ERROR --> Error while invoking session 1f5ce095-1582-46ac-9b45-79f51a69b976, invocation deb9ca93-64b3-4ea3-a982-0f43a23118e0 (ip_adapter):
[InvokeAI]::ERROR --> Traceback (most recent call last):
  File "...\invokeai\.venv\lib\site-packages\invokeai\app\services\session_processor\session_processor_default.py", line 129, in run_node
    output = invocation.invoke_internal(context=context, services=self._services)
  File "...\invokeai\.venv\lib\site-packages\invokeai\app\invocations\baseinvocation.py", line 300, in invoke_internal
    output = self.invoke(context)
  File "...\invokeai\.venv\lib\site-packages\invokeai\app\invocations\ip_adapter.py", line 129, in invoke
    image_encoder_model = self.get_clip_image_encoder(context, image_encoder_model_id, image_encoder_model_name)
  File "...\invokeai\.venv\lib\site-packages\invokeai\app\invocations\ip_adapter.py", line 190, in get_clip_image_encoder
    assert len(image_encoder_models) == 1
AssertionError

Even a subsecuent invocation triggers the same with the same result. Deleting this directory again does not help either.
This seems only happen to IP Adapters. Without them (i.e. just a normal generation) works fine.

I first noticed this issue from version 5.2 on.

What you expected to happen

Either a normal installation of a missing model or recognition of the existing model.

How to reproduce the problem

No response

Additional context

Might be related to these issues:

#6352
#7398

Discord username

No response

[hipsterusername]

Do you see any clip encoders in your Invoke model manager?