CPU Average Load

This web server is running on a Raspberry Pi (Model B) powered 100% by Solar energy
 Raspberry Pi

CPU Average Load every 5 minutes
Last Updated: Monday, September 20, 19:19:08

[ERROR: invalid format string '' (should match '^(?:[^%]+|%%)*%s(?:[^%]+|%%)*%lu(?:[^%]+|%%)*%lu(?:[^%]+|%%)*$')]
[ERROR: invalid format string '' (should match '^(?:[^%]+|%%)*%s(?:[^%]+|%%)*%lu(?:[^%]+|%%)*%lu(?:[^%]+|%%)*$')]
[ERROR: invalid format string '' (should match '^(?:[^%]+|%%)*%s(?:[^%]+|%%)*%lu(?:[^%]+|%%)*%lu(?:[^%]+|%%)*$')]
[ERROR: invalid format string '' (should match '^(?:[^%]+|%%)*%s(?:[^%]+|%%)*%lu(?:[^%]+|%%)*%lu(?:[^%]+|%%)*$')]
[ERROR: invalid format string '' (should match '^(?:[^%]+|%%)*%s(?:[^%]+|%%)*%lu(?:[^%]+|%%)*%lu(?:[^%]+|%%)*$')]