Collectd crash

Hi half an hour back the graphs stopped plotting. When I checked the system log it says this:

Blockquote Mon Jul 13 12:26:18 2020 kern.info kernel: [141026.833127] do_page_fault(): sending SIGSEGV to reader#0 for invalid write access to 77a9b9a0
Mon Jul 13 12:26:18 2020 kern.info kernel: [141026.833136] epc = 77c86d38 in dns.so[77c86000+14000]
Mon Jul 13 12:26:18 2020 kern.info kernel: [141026.833160] ra = 00410990 in collectd[400000+31000]
Mon Jul 13 12:26:23 2020 daemon.err collectd[8359]: configfile: stat (/etc/collectd/conf.d) failed: No such file or directory
Mon Jul 13 12:26:23 2020 daemon.err collectd[8359]: plugin_load: plugin "iwinfo" successfully loaded.
Mon Jul 13 12:26:23 2020 daemon.err collectd[8359]: plugin_load: plugin "ping" successfully loaded.
Mon Jul 13 12:26:23 2020 daemon.err collectd[8359]: plugin_load: plugin "memory" successfully loaded.
Mon Jul 13 12:26:23 2020 daemon.err collectd[8359]: plugin_load: plugin "cpu" successfully loaded.
Mon Jul 13 12:26:23 2020 daemon.err collectd[8359]: plugin_load: plugin "rrdtool" successfully loaded.
Mon Jul 13 12:26:23 2020 daemon.err collectd[8359]: plugin_load: plugin "interface" successfully loaded.
Mon Jul 13 12:26:23 2020 daemon.err collectd[8359]: plugin_load: plugin "dns" successfully loaded.
Mon Jul 13 12:26:23 2020 daemon.err collectd[8359]: plugin_load: plugin "load" successfully loaded.
Mon Jul 13 12:26:23 2020 daemon.err collectd[8359]: Initialization complete, entering read-loop.

It is looping continuously like this.
I was using stock firmware since last week and it ran fine and crash free up until now.

I disabled the dns plugin for now and no crash for the moment.

What can be the issue?