QIIME1 Install from Conda Failing

With following error message:
TASK [Install QIIME 1 from Conda] ****************************************************
fatal: [localhost]: FAILED! => {"msg": "The conditional check 'qiime1_env_installed.stat.exists == false' failed. The error was: error while evaluating conditional (qiime1_env_installed.stat.exists == false): 'qiime1_env_installed' is undefined\n\nThe error appears to have been in '/home/ubuntu/evomics_2017/genomics/software_tasks/qiime_env.yaml': line 5, column 3, but may\nbe elsewhere in the file depending on the exact syntax problem.\n\nThe offending line appears to be:\n\n\n- name: Install QIIME 1 from Conda\n ^ here\n"}
to retry, use: --limit @/home/ubuntu/evomics_2017/genomics/main_software.retry

Start with genomics/software_tasks/qiime_env.yaml at line 5 and inspect the failed “Install QIIME 1 from Conda” task and its qiime1_env_installed reference. Use the main_software.retry entry point to reproduce the installation failure; done means the QIIME 1 installation completes without the undefined-variable conditional error.

Written by the indexing model from the issue text.