Use true instead of yes.

tasks/miner/software/ethminer.yml

@@ -16,7 +16,7 @@
 - name: Miner | Software | Ethminer | Add PPA
   apt_repository:
     repo: ppa:ethereum/ethereum
-    update_cache: yes
+    update_cache: true
     state: present
 
 - name: Miner | Software | Ethminer | Install Ethereum
@@ -29,7 +29,7 @@
 - name: Miner | Software | Ethminer | Test If Installed
   shell: "which ethminer"
   register: ethminer_install
-  ignore_errors: yes
+  ignore_errors: true
 
 
 ## Download ##
@@ -37,7 +37,7 @@
   shell: rm -rf ethminer
   args:
     chdir: "{{ root_home.stdout }}/Downloads"
-  ignore_errors: yes
+  ignore_errors: true
   when: ethminer_install.failed
 
 - name: Miner | Software | Ethminer | Clone Git Repo