[GUI] [Err] [SystemPaths.cc:425] Unable to find file with URI [model://model_pkg/models/base.dae]

edit

Im trying to load an sdf of a model in a project structure like this:

src/
  model_pkg/
    urdf/
      diff_bot.sdf
      diff_bot.xml
    models/
      base.dae

with this this sdf:

<sdf version='1.10'>
  <model name='diff_bot'>
    <link name='base_link'>
      <inertial>
        <pose>0 0 0 0 0 0</pose>
        <mass>0.010288200184753521</mass>
        <inertia>
          <ixx>9.2e-05</ixx>
          <ixy>0</ixy>
          <ixz>0</ixz>
          <iyy>4.8999999999999998e-05</iyy>
          <iyz>0</iyz>
          <izz>0.000111</izz>
        </inertia>
      </inertial>
      <visual name='base_link_visual'>
        <pose>0 0 0 0 0 0</pose>
        <geometry>
          <mesh>
            <scale>1 1 1</scale>
            <uri>model://model_pkg/models/base.dae</uri>
          </mesh>
        </geometry>
      </visual>
    </link>
  </model>
</sdf>

with this bash script:

#!/bin/bash

export GAZEBO_MODEL_PATH=<insert path to project here>/src/model_pkg/models:
export GAZEBO_RESOURCE_PATH=<insert path to project here>/src/model_pkg/models:

gz sim <insert path to project here>/src/model_pkg/urdf/diff_bot.sdf

However, when I try to load the model with the .bash script, I get the error in the title, and other errors all relating to not being able to find the model, base.dae. Every post ive found thus far has said editing gazebo paths to lead to the model's location would fix the error(s), but editing the bash script to export GAZEBO_MODEL_PATH and GAZEBO_RESOURCE_PATH hasn't fixed that for me.

Is there something I'm missing?