# Can't connect to TPU runtime in C4\_W4\_Lab\_3\_CelebA\_GAN\_Experiments **URL:** \ **Category:** Generative Deep Learning with TensorFlow\ **Tags:** week-module-4, coursera-platform\ **Created:** [December 23, 2025, 12:46pm UTC](https://community.deeplearning.ai/t/cant-connect-to-tpu-runtime-in-c4-w4-lab-3-celeba-gan-experiments/885561 "2025-12-23T12:46:30Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![cecidisi](https://sea1.discourse-cdn.com/dlai/user_avatar/community.deeplearning.ai/cecidisi/32/93263_2.png) [@cecidisi](https://community.deeplearning.ai/u/cecidisi)\ **Post date:** [December 23, 2025, 12:46pm UTC](https://community.deeplearning.ai/t/cant-connect-to-tpu-runtime-in-c4-w4-lab-3-celeba-gan-experiments/885561/1 "2025-12-23T12:46:30Z")
Hi, When I click on Connect to the TPU runtime in Collab I get the error “Unable to connect to the runtime“. The pop up appear on the bottom left of the screen without further details as to why it failed. I added 2 screenshots below for more clarity **Pre-select runtime in collab:** ![image](https://global.discourse-cdn.com/dlai/original/3X/b/4/b4ffcf29e14d244802558fad68d4f607afa13f02.png) **Error message pop-up** ![image](https://global.discourse-cdn.com/dlai/original/3X/e/5/e5a1471de61fc20a5f1faaef6068e1f2bb5f976d.png) Has anyone experienced and knows how to solve this problem? Thanks a lot! ---
**Author:** ![gent.spah](https://sea1.discourse-cdn.com/dlai/user_avatar/community.deeplearning.ai/gent.spah/32/136423_2.png) [@gent.spah](https://community.deeplearning.ai/u/gent.spah)\ **Post date:** [December 24, 2025, 2:56pm UTC](https://community.deeplearning.ai/t/cant-connect-to-tpu-runtime-in-c4-w4-lab-3-celeba-gan-experiments/885561/2 "2025-12-24T14:56:41Z")
Does the Lab instruct to connect this one? You may try again today, maybe sometime there are congestions…