git clone https://github.com/koide3/glim_ext --recursive
>>> Submodule path 'modules/backend/scan_context_loop_detector/thirdparty/scancontext': checked out 'b68f8d1f077e091a4d85404265a8c69355107634'
>>> fatal: No url found for submodule path 'modules/backend/scan_context_loop_detector/thirdparty/scancontext/example/longterm_localization/NCLT/2012-01-15/3_Inference/PRcurve/src/npy-matlab' in .gitmodules
>>> Submodule path 'modules/frontend/orb_slam_frontend/thirdparty/ORB_SLAM3': checked out 'bdbe4437985368452bff9484a5b8239241677b2a'
>>> fatal: Failed to recurse into submodule path 'modules/backend/scan_context_loop_detector/thirdparty/scancontext'
Overview
while following the glim repo, to run
some module urls are not valid anymore
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is this a critical issue? or we can ignore them